Development of charged particle detection systems for materials analysis with rapid ion beams : large solid angle detectors and numerical nuclear pulse processing

Abstract : This thesis presents new developments in charged particle detection and digital pulse processing for application in analysis with fast ion beams - Ion Beam Analysis (IBA). In particular a charged particle detector array, consisting of 16 independent charged particle detectors on a single silicon chip is implemented giving an overall solid angle of detection around two orders of magnitude greater than the standard charged particle detectors used in IBA. Sixteen parallel data acquisition channels are implemented using a fully digital approach for nuclear pulse processing. The overall system has an energy resolution equivalent to that of standard detectors. The large amount of data generated is handled in a self-consistent way by spectrum fitting with a simulated annealing algorithm via the NDF DataFurnace. The large solid angles thus achieved are exploited in Rutherford Backscattering Spectrometry (RBS) and ion channelling studies of the topological insulator Bi2Se3 enriched in Fe, in view of studies of the thermo-electric effect, spintronics and quantum computing, and in RBS and Nuclear Reaction Analysis (NRA) studies of organic photovoltaic materials based on tetraphenyldibenzoperiflanthene (DBP) as the photo-absorber and transition metal oxide charge injectors.
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Víctor Alarcón Díez. Development of charged particle detection systems for materials analysis with rapid ion beams : large solid angle detectors and numerical nuclear pulse processing. Physics [physics]. Université Pierre et Marie Curie - Paris VI, 2016. English. ⟨NNT : 2016PA066489⟩. ⟨tel-01512657⟩

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